JPH03199792A - Adjusting device for thermostat for engine - Google Patents

Abstract

PURPOSE:To make the holding temperature of a thermostat constant by providing an actuating casing, an actuating piston rod, a thermosensible casing, thermo-expansible fluid, a stopper mechanism for regulating the valve opening rate of the thermostat, and a relief piston rod for relieving pressure. CONSTITUTION:An adjusting device 30 which is provided on a thermostat 10 for an engine of an automobile or the like for adjusting the actuation of the thermostat 10 is composed of an actuating section 31 and a thermo-sensing section 32. The actuating section 31 is inserted in an actuating casing 33, and provided with an actuating piston rod 34 to increase the quantity of engine cooling water when the tip of the actuating section 31 has protruded from the actuating casing 33. The actuating piston rod 34 has a stopper mechanism 37. The thermo-sensing section 32 is provided with a relief piston rod 39 in a thermosensible casing. The valve opening rate of the thermostat can therefore be changed according to outside air temperature to keep cooling water temperature nearly constant.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an adjustment lever ζl that is installed in an engine thermostat with a movement of 1 tA,f and that adjusts its operation.

BACKGROUND OF THE INVENTION Engine thermostats are installed in the flow path of engine coolant to adjust the flow of water to a radiator to keep the coolant temperature, that is, the engine temperature, constant. Since this thermostat determines the opening valve p, (11) depending on the temperature, when the outside temperature is low and the radiator's zero cooling capacity is large, the temperature is set in a state where the diameter j (, j,) is small, that is, at a relatively low temperature. When the outside temperature is high and the radiator's zero cooling capacity is small, the temperature is maintained in a state where Pffl is large, that is, at a high temperature.The temperature difference between these two states is
The temperature can reach as high as 10 to 15°C, resulting in inconveniences such as an increase in fuel consumption τV and a lack of heating effect inside the vehicle in winter.

Therefore, in order to overcome this inconvenience, the present invention provides an adjustment device that adjusts the temperature of the thermostat according to the outside temperature so as to keep the temperature maintained by the thermostat constant.
The target is

Means for Solving the Problems The present invention provides an operating casing that is installed in the flow path of engine cooling water (=ICJ), and a lower inlet/outlet [
When the tip protrudes from the operating casing, it inhibits the thermostat provided in the flow path that regulates the engine cooling water =J,>, passing through the radiator.
an actuating piston rod that increases r21; a heat-sensitive casing that communicates with the actuating casing through a conductor Ii1 and is exposed to the outside air; the actuating casing, the conductor and the heat-sensitive casing are filled with clay, and the temperature '-increases++; i to ;)
11. Thermal expansion that causes the working piston rod to protrude 1: A fluid, a stopper mechanism that limits the protrusion of the working piston rod and prevents the thermostat's valve opening 11 from increasing excessively, and an inlet/outlet in the heat-sensitive casing. 7J:, niha: is inserted and urged by a spring to retreat into the heat-sensitive casing, r) when the n fluid expands, causes the actuating piston rod to protrude, and is stopped by a stopper mechanism, A regulating device for an engine river thermostat, characterized in that it has a relief piston rod which is projected against a spring and relieves the IrE forces in the two casings.

Operation In this regulating device, when the outside temperature becomes high, the fluid in the heat-sensitive casing senses this and expands, protruding the working piston rod and forcibly increasing the opening p, [i of the thermostat. Therefore, even if the zero cooling capacity of the radiator decreases, the cooling water temperature is prevented from increasing.

In addition, since there is a stopper mechanism, the eye movement i1j can be reduced by 1 during the summer.
When the vehicle is parked in one direction, the fluid in the heat-sensitive casing becomes extremely hot, but this prevents the thermostat from being pushed excessively and increasing the amount of spacer F more than necessary. Further, when this stopper mechanism is activated, the relief piston rod protrudes, so that the pressure inside the casing is released and no trouble occurs.

EXAMPLES Below, examples illustrating the present invention will be specifically described.

In the figure, numeral 10 denotes a thermostat, which is attached to the flow path 11 of the engine cooling water of the motor vehicle.

This thermostat 10 has 10 bodies 13 attached to a button seat 12 provided so as to partition a flow path with a spring 14.
A heat-sensitive actuator 15 is attached to these 10 bodies 13. This actuator 15 has a built-in thermal expansion material such as wax, and when the temperature rises by 1, the piston rod 1
6 is pushed out, and the reaction force pulls the valve body 13 away from the valve seat 12, causing the tAJ valve to flow, allowing cooling water from the engine side 17 to flow to the radiator side 18. Further, at the lower part of the actuator 15, another valve body 19 is provided so as to be pushed out by a spring 20, and at the same time, a bypass side 21
stop the flow of Thus this thermostat 1
0 holds the cooling water temperature constant.

Reference numeral 30 denotes an adjustment device of the present invention, which is composed of an operating section 31 and a heat-sensitive section 32.

The actuating part 31 includes an actuating piston rod 3 in an actuating casing 33.
4 is provided and is taken outside the flow path 11. The actuating piston rod 34 is inserted into and out of the seal portion 35 of the actuating casing 33, and its tip is brought into contact with the tip of the piston rod 16 of the thermostat 10, and when it protrudes, it pulls the valve body 13 away from the button seat 12, thereby increasing the valve opening amount. can be increased. A large-diameter portion 36 is formed at the rear end of the actuating piston rod 34 and can come into contact with the inner surface of the seal portion 35 to constitute a stopper mechanism 37 to limit the protrusion of the actuating piston rod 34 and stop the thermostat 10. This prevents the opening of the valve from increasing excessively. Note that this stopper mechanism can have any configuration as long as it limits the protrusion of the actuating piston rod.

The heat sensitive part 32 is connected to the heat sensitive casing 38 and the piston rod 3
9, and is installed at a location where it is exposed to the outside air and is not affected by the temperature of the engine or radiator.

The relief piston rod 39 is inserted into the seal portion 40 of the heat-sensitive casing 38 at the entrance/exit position, and has a nut 41.4 at the tip.
1 is attached. Rear end 4 of relief piston rod 39
A spring 43 is provided between 2 and the inner surface of the seal portion 40,
The relief piston rod 39 is biased into the heat sensitive casing 38 and the nut 41, 41 is normally inserted into the seal portion 40.
It is in contact with the outside surface.

The operating casing 33 of the operating section 31 and the heat-sensitive casing 38 of the heat-sensitive section 32 are connected by a conduit 44, and a thermally expandable fluid 4 exclusively made of silicone oil is contained in these casings and the conductor.
5 is filled.

This adjustment device v1.30 has the following configuration and operates as follows.

When the outside temperature is low, as shown in Figure 1, the fluid 45 is in an unexpanded state and the actuating piston rod 34
is not outstanding. For this reason, the thermostat 10 is activated by bringing the tip of its piston rod 16 into contact with the tip of the operating piston rod 34 at this 4+' position, and the flow (-) to the radiator is activated.
The temperature is kept constant by controlling the temperature.

When the outside temperature rises, the fluid 45 expands and causes the actuating piston rod 34 to protrude. Therefore, in the thermostat 10, the 11 body 13 is pushed down and the open valve FtJ increases, so even if the cooling capacity of the radiator decreases due to the rise in outside temperature, the temperature remains the same as when the outside temperature is low. Can maintain cooling water temperature.

Furthermore, if the outside temperature becomes extremely high, the fluid 4
5 expands greatly, causing the actuating piston rod 34 to protrude until the stopper mechanism 37 is activated, and then causing the relief piston rod 39 to protrude. At this time, the valve opening amount of the thermostat 10 will not be greatly increased or become excessive, and the pressure within both casings 33 and 38 will not become excessive and be damaged.

Effects of the Invention As mentioned above, the adjustment device of the present invention changes the opening amount of the thermostat according to the outside temperature, so even if the cooling capacity of the radiator changes depending on the outside temperature, the cooling water temperature, that is, the engine temperature, remains almost constant. held constant. In addition, since the stopper mechanism and the relief piston rod are moved to the right, even if the outside air temperature becomes abnormally high when the moving wheel is moved to the 11th direction during the imperial period, the thermostat opening valve Fj℃ will be removed. This also prevents the inconvenience of increasing the amount of water.

4. Brief Explanation of the Drawings FIG. 1 is a cross-sectional view showing the state of use of a failed embodiment of the present invention.

10...Thermostat, 11...Flow path, 30...
・Tone f7ti equipment +v1. ．． 33...operating casing,
34... Operating piston rod, 37... Stopper mechanism,
38... Heat sensitive heating, 39... Relief piston rod, 43... Spring, 44... Conduit, 45... Thermal expansion 1: Fluid.

Special, ;'1 Yorito Yama 11 books I'1ken Co., Ltd.] 呵

Claims (1)

[Claims] 1. An operating casing that is attached to the engine cooling water flow path, and an operating casing that is inserted into and out of the operating casing,
When the tip protrudes from the operating casing, the tip communicates with the operating casing by a conduit, pushing a thermostat provided in the flow path and increasing the amount of valve opening by pushing a thermostat that adjusts the amount of engine cooling water passing through the radiator; a heat-sensitive casing provided exposed to the outside air; a thermally expandable fluid filled in the working casing, the conduit, and the heat-sensitive casing and causing the working piston rod to protrude when the temperature rises; and limiting the protrusion of the working piston rod; A stopper mechanism that prevents the valve opening amount of the thermostat from excessively increasing, and a stopper mechanism that is inserted into and out of the heat-sensitive casing and is biased by a spring to move into and out of the heat-sensitive casing, causing the fluid to expand and operate. When the piston rod is made to protrude and is stopped by the stopper mechanism, it is made to protrude against the spring,
A regulating device for an engine thermostat, comprising a relief piston rod that relieves the pressure in both of the casings.